162173 Ryugu (1999 JU3)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1910626253 ± 2.00e+00
Semi-major axis (a)1.1909211747 AU ± 3.00e+00
Inclination (i)5.86654965° ± 4.00e+00
Long. of Asc. Node (Ω)251.29160345° ± 5.00e+00
Arg. of Perihelion (ω)211.61670373° ± 6.00e+00
Mean Anomaly (M)270.65926628° ± 7.56e-06
Mean Motion (n)0.7583815353°/day ± 2.87e+00
Perihelion dist (q)0.96338065 AU ± 3.40e+00
Aphelion dist (Q)1.41846170 AU ± 4.29e+00
Orbital Period1.29964436 yr ± 4.91e+00
NGA Modelr2
A21.49982929e-05 AU/d²
Physical Parameters
H (abs. magnitude)19.55
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.086″
Uncertainty0
Orbit TypeApollo
MOID0.000212 AU
Observations Used4741
Gaia Obs Used94
Oppositions7
Arc Total1986-2016
First Observation Used1999-05-10
Last Observation Used2025-07-23
Observations (7718)
Date Type RA Dec Mag Band Observatory
2021-01-24 20:14:07 S 05 44 25.087 -78 16 00.73 V C57
2021-01-24 20:14:07 s 1 -199170.05 4 +174766.03 970.0 C57
2021-01-24 20:24:07 S 05 44 34.930 -78 15 51.77 V C57
2021-01-24 20:24:07 s 1 -199166.42 5 +174079.20 5280.0 C57
2021-01-24 20:34:07 S 05 44 45.278 -78 15 38.66 V C57
2021-01-24 20:34:07 s 1 -199161.28 8 +173391.05 6930.0 C57
2021-01-24 20:44:07 S 05 44 54.029 -78 15 25.63 V C57
2021-01-24 20:44:07 s 1 -199154.63 5 +172701.59 5900.0 C57
2021-01-24 20:54:07 S 05 45 03.670 -78 15 15.84 V C57
2021-01-24 20:54:07 s 1 -199146.45 9 +172010.81 2190.0 C57
2021-01-24 21:04:07 S 05 45 12.883 -78 15 00.07 V C57
2021-01-24 21:04:07 s 1 -199136.75 2 +171318.73 5780.0 C57
2021-01-24 21:14:07 S 05 45 23.402 -78 14 53.59 V C57
2021-01-24 21:14:07 s 1 -199125.50 5 +170625.32 6650.0 C57
2021-01-24 21:24:07 S 05 45 30.782 -78 14 42.36 V C57
2021-01-24 21:24:07 s 1 -199112.71 3 +169930.60 4800.0 C57
2021-01-24 21:34:07 S 05 45 42.706 -78 14 27.96 V C57
2021-01-24 21:34:07 s 1 -199098.36 5 +169234.56 200.0 C57
2021-01-24 21:44:07 S 05 45 51.854 -78 14 18.49 V C57
2021-01-24 21:44:07 s 1 -199082.45 5 +168537.20 2840.0 C57
2021-01-24 21:54:07 S 05 46 01.212 -78 14 04.09 V C57
2021-01-24 21:54:07 s 1 -199064.97 4 +167838.52 2710.0 C57
2021-01-24 22:04:07 S 05 46 09.763 -78 13 54.26 V C57
2021-01-24 22:04:07 s 1 -199045.91 5 +167138.51 9800.0 C57
2021-01-24 22:14:07 S 05 46 20.880 -78 13 44.72 V C57
2021-01-24 22:14:07 s 1 -199025.26 8 +166437.18 4080.0 C57
2021-01-24 22:24:07 S 05 46 29.647 -78 13 32.70 V C57
2021-01-24 22:24:07 s 1 -199003.02 7 +165734.52 5550.0 C57
2021-01-24 22:34:07 S 05 46 39.821 -78 13 21.76 V C57
2021-01-24 22:34:07 s 1 -198979.18 1 +165030.54 4180.0 C57
2021-01-24 22:44:07 S 05 46 49.630 -78 13 07.57 V C57
2021-01-24 22:44:07 s 1 -198953.72 4 +164325.22 9960.0 C57
2021-01-24 22:54:07 S 05 46 59.424 -78 12 54.94 V C57
2021-01-24 22:54:07 s 1 -198926.64 7 +163618.58 2890.0 C57
2021-01-24 23:04:07 S 05 47 08.297 -78 12 43.52 V C57
2021-01-24 23:04:07 s 1 -198897.94 1 +162910.60 2930.0 C57
2021-01-24 23:14:07 S 05 47 18.187 -78 12 31.97 V C57
2021-01-24 23:14:07 s 1 -198867.59 8 +162201.29 90.0 C57
2021-01-24 23:24:07 S 05 47 27.194 -78 12 19.66 V C57
2021-01-24 23:24:07 s 1 -198835.60 9 +161490.65 4330.0 C57
2021-01-24 23:34:07 S 05 47 37.246 -78 12 06.80 V C57
2021-01-24 23:34:07 s 1 -198801.96 5 +160778.67 5650.0 C57
2021-01-24 23:44:07 S 05 47 47.028 -78 11 57.30 V C57
2021-01-24 23:44:07 s 1 -198766.65 7 +160065.35 4030.0 C57
2021-01-24 23:54:07 S 05 47 56.280 -78 11 45.20 V C57
2021-01-24 23:54:07 s 1 -198729.67 8 +159350.70 9450.0 C57
2021-01-25 00:04:07 S 05 48 07.433 -78 11 30.62 V C57
2021-01-25 00:04:07 s 1 -198691.01 7 +158634.70 1900.0 C57
2021-01-25 00:14:07 S 05 48 16.716 -78 11 18.46 V C57
2021-01-25 00:14:07 s 1 -198650.66 6 +157917.36 1360.0 C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2020-12-12 03:00:00 70251762.49 2 us 8560 -14 -14
2020-12-18 01:10:00 64846561.92 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)